Economizer



June 24, 1930. D, s, JACOBUS El AL 1,765,532

ECONOMIZER Filed Oct. 20, 1924 3 Sheets5heet l ATTORNEYS June 24, 1930. s, JACOBUS ET AL ECONOMIZER Filed OGB. 20, 1924 3 Sheets-Sheet 2 O O O O O O O O O O O O O 0 O IN VENTO s- M ATTORNEYS June 24, 1930. s, JACOBUS ET AL ECONOMIZER 1924 3 Sheets-Sheet 3 Filed Oct o o o ATTORNEYS move the accumulated dust.

Patented June 24, 1930 UNITED STATES PATENT: OFFICE DAVID S. JACOB'US, OF JERSEY CITY, NEW JERSEY, AND WILLIAM A. JONES, OF WEST NEW BRIGHTON, NEW YORK, ASSIGNORS TO THE BABGOCK 8c WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY ECONOMIZER Application filed. October 20, 1924. Serial No. 744,548.

Our present invention relates to steam boiler economizers, and particularly to devices for removing the deposits from the gases collecting thereon, and will be best understood from the following description and the annexed drawings, in which Fig. 1 is a vertical section of one form of economizer embodying our invention; Fig. 2 is a side view, partly in section, of the economizer shown in Fig. 1; Fig. 3 is an enlarged View of a portion of Fig. 1, and Fig. 4 is a section on the line 44 of Fig. 3.

Like reference characters indicate like parts in the several views.

In the arrangement shown in the drawings, we have illustrated only the upper part of a superheater water tube. boiler of a known type, in which the gases, after passing over the boiler tubes and the superheater, flow upward through a gas exit 10 defined between a wall 11 and a baffie wall 12 of a flue, and thence over the top of the bafilewall 12 and downward through aflue defined between the baffle wall 12 and a side wall 13, to a gas exit 14, the flue having also side walls 15 and 16. The walls 11, 13, 15 and 16 are made up in panels so that they may be readily removed, as may also the top 17 of the flue. In the flue defined by the walls 12 and 13 and adjacent respectively to the walls 15 and 16 is a set of horizontal boxes or headers 18 and 19, connected by water tubes 20 arranged so that the water entering at the economizer inlet 21 will flow backand forth through the tubes 20 and the headers 18 and 19 to the economizer outlet 22 at the top of the economizer. The economizer thus described is of a known type, and further description thereof will be unnecessary.

It is desirable to maintain the surfaces of the tubes 20 free from soot and other deposits from the flue gases, and to this end, We provide one or more soot blowers, each having a. blower tube 23 having inwardly extending jet nozzles 24 positioned along the length of the tubeto blow jets of steam or gas amongst the tubes 20 of the economizer and thus re- The tubes 23 are supported in brackets 25 mounted on the top 17 of the flue and the tubes 23 may be The tubes 23 are located closely adjacent the walls 12 and 13, respectively, and there may be as many of them distributed, along the length of the tubes 20' as may be desired, in the arrangement illustrated, there being two of such blowers on each side of the economizer. In order to provide a space through which the tubes 23 may be inserted, we position the outermost tubes 20 in relation to the side wall so as to provide suificient space for this purpose. By locating the blower tubes 23 in the position indicated, the dust will be blown toward the center of the flue, to be carried downward by the gases, and such dust will not be blown against theside walls of the flue where the dust is liable to remain in a sticky condition, as would be the case if the blowers 23 were inserted toward the, center of the bank of tubes 20.v I

In order to position the blower tubes, 23 and provide an arrangement in which the gases will not short circuit through the space between the economizer tubes and the walls 12 and 13 we provide a number of baffles 28 consisting of angle-irons extending through substantially the full length of the side walls. Holes are drilled through one leg of each of the angle-irons, these holes being sufiiciently large to permit the blower tubes 23' to be passed through them and to be rotated therein. The other legs of the angle-irons adjacent their ends are fastened by removable .bolts to the wall 12 or 13, as the case may be.

It will be obvious that if thebaiiies 28 were not thus removably attached to the supporting walls, it would be necessary 'to draw the blower tubes 23 straight upward in removing v.them' from the economizer for repair purposes or the like. By making the baflies 28 removably attached to the wall, such battles may be first detached from the wall and slid over the lower ends of the tubes, any fittings 29 on these ends being removed if necessary.

Then a blower tube 23 may be detached from its support and may be readily manipulated so that it may be withdrawn without requiring the amount of space above the top 1 17 of the economizer flue which would be required if the bearings were attached in such a manner that the tubes 23 must be drawn straightupward to remove them. The tube 23 which is being removed may be conveniently manipulated by removing one of the panels of the top 17 of the flue upon which the support 25 is placed. This will usually give ample room for removal of a tube, al

though of course it is to be understood that more panels may be removed if necessary. It will be noted that the nozzles 24 shown in Fig. 4c, are so arranged that they leave the exterior surface 01" the tube in which they are disposed substantially free oi": projections so that the tubes may be moved freely through openings in the baflies without interference from the nozzles.

It will be evident that by using a suiflcient number of the baffles 28, the gases will be prevented from short circuiting through the space between the economizer tubes and the side wall and will be made to flow eflectively over the cconomizer tubes.

. While we have shown our invention in an economizer in which the flue therefor is vertical, it will be obvious that it may also be embodied in a horizontal flue. It will also be obvious that the embodiment of our invention may be widely varied and that the form 3 which we have shown has been chosen merely for purposes of illustration.

lVe claim:

1. A'flue, a heat exchange device therein having a pair of sets of parallel'boxes with the sets located respectively at opposite sides of the flue and water tubes extending across the flue and connecting the boxes, and a soot blower tube extending crosswise of the water tubes and between the tubes and a wall of the flue, suflicient space being provided between said water tubes and the associated side of the flue to permit movement of a soot blower tube lengthwise of the water tubes and substantially throughout the length of said water tubes.

2. A vertical flue, a heat exchange device therein having a pair of sets of horizontal boxes with the sets located respectively at therein having a pair of sets of horizontal boxes wit-h the sets located respectively at opposite sides of the flue and water tubes extending across the flue and connecting the boxes, and vertical soot blower tubes extending along the side walls of the flue between said sets of boxes and between the water tubes and said side walls, sufflcient space being provided between said water tubes and the asso ciated side walls of the flue to permit movement of said soot blower tubes lengthwise of the water tubes and substantially throughout the length of said water tubes, said soot blower tubes 'beingsupported from the top of the flue.

4. A verticalflue, a heat exchange device therein having a pair of sets of horizontal boxes with the sets located respectively at opposite sides of the flue and water tubes extending across the flue and connecting the boxes, and vertical soot blower tubes extending along the side walls of the flue between said sets of boxes and between the water tubes and said sidewalls, suflicient space being provided between said water tubes and the associated sidewalls oi' the flue to permit movement of, said soot blower tubes lengthwise of the water tubes and substantially throughout the length of said water tubes, said soot blower tubes being supported from the top oi'the flue, and each of said side walls havin a plurality of bearings for each soot blower tube connected thereto.

5. A-flue, a heat exchange device therein 7 having boxes and water tubes extending across the flue, a soot blower tube extending crosswise of the water tubes and between the tubes and the walls of the flue, sufficient space being provided between said water tubes and the associated side of the fine to permit movement of said soot blower tube lengthwise of the water tubes and substantially throughout the length of said water tubes, and a baflie parallel to the water tubes and in the space between the watertubes and the sides of the flue, said soot blower tube extending through said baflle. I r g 6. A flue, a heat exchange device therein having boxes and water tubes extending across the flue, a plurality of soot blower tubes extending crosswise of the water tubes and between the tubes and the walls of the flue, sufi'icient space being provided between blower tubes lengthwise of the water tubes and substantially throughout the length of said water tubes, and a plurality of baflies parallel to the water tubes and in'the space between the water tubes and the side or" the flue, said soot blower tubes extending through said baflles and said b-aflles being spaced relatively close together to divert the gases from the spaces between the water tubes and the sides of the flue.

7. A flue, a heat exchange device disposed therein and having tubes extending transversely of the flue and spaced from a wall thereof, a soot blower disposed in said space, and one or more baflles also disposed in said space, said baifles havingopenings therein ,for the passage of said blower therethrough.

8. A flue, a heat exchange device disposed therein and having tubes extending transversely of the flue and spaced from a wall thereof, a soot blower disposed in said space, and one or more baffles also disposed in said space, said baffles having openings therein for the passage of said blower therethrough,

said blower comprising a tube having discharge openings, the exterior surface of said tube adjacent said openings being free of projections.

9. A flue, a heat exchange device disposed therein and having tubes extending transversely of the flue and spaced from a wall thereof, a soot blower disposed in said space, one or more baffles also disposed in said space,

said baffles having openings therein for the v passage of said blower therethrough, and means removably securing said b-afiles to said wall.

10. A flue having a wall with an inner surface disposed in a single plane substantially throughout its extent, a heat exchange device disposed in said flue and having tubes extending transversely of the flue and spaced from said surface, and a soot blower disposed in said space and having nozzles adapted to blow soot from said surface of the wall.

DAVID S. JACOBUS. WILLIAM A. JONES. 

